Security Analyses Sample Clauses

Security Analyses. The attacker’s aim is either to impersonate a genuine user or to learn the key between the server and any victim user for eavesdropping purposes. We do not assume a secure channel. Thus, the attacker can obtain all protocol messages including the genuine and fake blocks’ list sent by the user and exchanged HMACs. Consequently, the attacker learns the number of blocks used for the key agreement. However, our protocol computationally resists well-known attacks as discussed below.

Security Analyses. Our security analysis is focused on verifying the overall security requirements for the proposed privacy supporting HKAP including passive and active attacks as follows. Proposition 1. The proposed privacy supporting HKAP is secure against passive and active attacks.